Chemical exfoliation of pure graphene sheets from synthesized ZnO-graphene quasi core-shell quantum dots

Title
Chemical exfoliation of pure graphene sheets from synthesized ZnO-graphene quasi core-shell quantum dots
Authors
손동익권병욱김홍희박동희Basavaraj Angadi최원국
Keywords
chemical exfoliation; ZnO-graphene; quantum dots; graphene
Issue Date
2013-08
Publisher
Carbon
Citation
VOL 59, 289-295
Abstract
We report on a novel, simple and easy method to produce graphene layers using chemically synthesized ZnO–graphene quasi core–shell quantum dots. Initially, graphite powder was partially oxidized by acid treatment of graphite powder, which was then mixed with zinc acetate dihydrate in a dimethyl formamide solution. During this process, graphene sheets were detached from the graphite oxide layers through a layer-by-layer chemical peel-off and then partially covered from ZnO quantum dots which formed in the dimethyl formamide solution. Therefore, the ZnO–graphene quantum dots were dissolved in hydrochloric acid solution and then pure graphene layers were extracted from solution. The structural, optical, and electrical properties of obtained graphene layers were analyzed by using X-ray diffraction, transmission electron microscope, Raman spectroscopy, X-ray photoemission spectroscopy instrument.
URI
http://pubs.kist.re.kr/handle/201004/44857
ISSN
00086223
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KIST Publication > Article
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